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Title: Dual power supply Post by: MAXPAYNE on January 30, 2008, 07:51:21 19:51 Has sombody build the power supply on figure 2 (vsn 2) ??? is it working properly ?
http://sound.westhost.com/project44.htm Title: Re: Dual power supply Post by: Trishool on February 02, 2008, 12:23:09 12:23 Has sombody build the power supply on figure 2 (vsn 2) ??? is it working properly ? http://sound.westhost.com/project44.htm The schematic looks convencing for a lab powersupply but not for anyhing beyond that , what application you require powersupply for?. Ts Title: Re: Dual power supply Post by: smartcat004 on February 02, 2008, 03:40:09 15:40 I have confidence the circuit should work, you can't go wrong with these conventional regulators
except do remember to use a minimal heat sink if you are running > 300 mA.. And anything above 1A means you need to make sure the heat sink is really a solid one with fins and the regulator body is thermally connected to heat sink(use the heat transfer paste materials...). Title: Re: Dual power supply Post by: MAXPAYNE on February 02, 2008, 08:09:33 20:09 The schematic looks convencing for a lab powersupply but not for anyhing beyond that , what application you require powersupply for?. Ts I will use as lab supply Title: Re: Dual power supply Post by: Trishool on February 03, 2008, 08:34:32 08:34 I will use as lab supply Figure 2 , has better trimming and Adjustments , but temperature compensation isnt there . If you need that fine supply I can post here schematic how to temperature compensate it and rest of the issue I hope you can integrate on your own . BTW: what Load/Line regulation you need? Ts Title: Re: Dual power supply Post by: MAXPAYNE on February 03, 2008, 07:10:19 19:10 Figure 2 , has better trimming and Adjustments , but temperature compensation isnt there . If you need that fine supply I can post here schematic how to temperature compensate it and rest of the issue I hope you can integrate on your own . BTW: what Load/Line regulation you need? Ts Thanks for uor reply. please post the schematic. line regulation may be 1%-4% Title: Re: Dual power supply Post by: Trishool on February 04, 2008, 07:00:15 07:00 Thanks for uor reply. please post the schematic. line regulation may be 1%-4% Ahhh for that you dont need Temperature compensation . Your schematic is cool what is the confusion explain openly , such that we may find some remedy for it. Ts Title: Re: Dual power supply Post by: MAXPAYNE on February 05, 2008, 01:16:37 01:16 (http://Please suggest how can i chose R1, R2, R3 and R4 if i wanna 1A through each regulator and 3A through bypass transistor for both positive and negative side.)
Posted on: February 05, 2008, 07:14:54 07:14 - Automerged Please suggest how can i chose R1, R2, R3 and R4 if i wanna 1A through each regulator and 3A through bypass transistor for both positive and negative side. Title: Re: Dual power supply Post by: Trishool on February 05, 2008, 06:41:57 06:41 (http://Please suggest how can i chose R1, R2, R3 and R4 if i wanna 1A through each regulator and 3A through bypass transistor for both positive and negative side.) Posted on: February 05, 2008, 07:14:54 07:14 - Automerged Please suggest how can i chose R1, R2, R3 and R4 if i wanna 1A through each regulator and 3A through bypass transistor for both positive and negative side. MAXPAYNE , There is no bypass transistor in the schematic you show. The transistors Q1 , Q2 are meant for fine regulation on the adjust pin , its a feed back loop topology. Ts Posted on: February 05, 2008, 07:36:17 07:36 - Automerged MAXPAYNE , BTW 3A at max 24V is 72 Watts ? . Very big heatsinks , instead go for SMPS or I have a link below : http://www.instructables.com/id/Converting-a-computer-ATX-power-supply-to-a-really/ Title: Re: Dual power supply Post by: MAXPAYNE on February 05, 2008, 07:17:35 19:17 do u hae any adjustable swiching dc supply ? (0-30V)
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